pa1778data.pdf
pa1778data.pdf
pa1778data.pdf
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•U.S. STEEL DUQUESNE WORKS<br />
HAER No. PA-115<br />
(Page 75)<br />
process originally took place at the BOP shop where the contents<br />
of "submarine" ladle cars from the blast furnaces were reladled<br />
into open top ladles before the iron was manually desulphurized.<br />
The time taken to desulphurize the iron in this manner resulted<br />
in a significant drop in the temperature of the molten bath,<br />
thereby increasing the oxygen blowing time at the furnace. Under<br />
the new system, the "submarine" cars were taken directly from the<br />
cast house to the desulphurization building where they were<br />
spotted under one of the facility's two fume hoods. A lance<br />
transfer car, riding on rails on the second floor of the<br />
building, was positioned at the fume hood where its lance was<br />
inserted down through a hood opening into the top opening of the<br />
"submarine" car. Calcium carbide was then drawn from a 220-ton<br />
silo located next to the building and blown through the bath.<br />
The resulting fumes from the blow were directed through the hood<br />
to a bag house attached to the western wall of the building where<br />
the particulate was filtered out before the gasses were exhausted<br />
to the atmosphere through a nearby stack. After the process was<br />
complete, the resulting slag was skimmed off the bath and<br />
"submarine" cars were taken to the BOP shop. Because the<br />
-^ "submarine" ladles also acted as mixers, the temperature of the<br />
^p bath remained constant. Consequently, the blowing period at the<br />
oxygen furnace was decreased. 7<br />
ENDNOTSS:<br />
l.J. M. Camp and C. B. Francis, The Makingf Shaping, and<br />
Treating of Steelf Fourth Edition, (Pittsburgh: 1924), 204 - 06;<br />
William T. Hogan, Economic History of the Iron and Steel Industry<br />
in the United States, Volume Two, (Lexington: 1971), 391 - 93; K.<br />
A. Uehling, "Advantages of Sandless Pig Iron," The Iron Trade<br />
Review 31 (March 3, 1898): 14 - 16; J. M. Camp and C. B. Francis.<br />
The Making. Shaping and Treating of Steel, Sixth Edition,<br />
(Pittsburgh: 1951), 292, 730; Bruce Shields, former Chief<br />
Metallurgist at the Duquesne Works and Director of Metallurgical<br />
Engineering for the United States Steel Corporation, interviewed<br />
by author, March 3, 1990.<br />
2."The Duquesne Furnace Plant of the Carnegie Steel Company<br />
Limited," The Iron Age 59 (March 25, 1897): 8, 9; "The Duquesne<br />
Furnaces of the Carnegie Co., Ltd.," The Iron Trade Review 30<br />
(March 25, 1897): 10; "The Duquesne Furnace Record," The Iron Age<br />
29 (September 10, 1896): 492; "A Duquesne Blast Furnace Record,"<br />
The Iron Age 77 (April 12, 1906): 1261.<br />
3."The Duquesne Furnace Plant," 9; Gary B. Kulik, "Sloss-<br />
Sheffield Steel & Iron Company Furnaces," (Unpublished Paper<br />
prepared for the Historic American Engineering Record, 1976): 5;